Walking to the shops one day in London's Notting Hill, fifty-year-old Eugene Wren discovers an envelope on the street bulging with cash. A man plagued by a shameful addiction, Wren hatches a plan to find the money's rightful owner. Instead of going to the police, or taking the cash for himself, he prints a notice and posts it around Portobello Road. This ill-conceived act creates a chain of events that links Wren to other Londoners--people afflicted with their own obsessions and despairs. As these volatile characters come into Wren's life--and the life of his trusting fiancée--the consequences will change them all.